Cylindrical kiln



/ Nov. 15, 1927,

G. M CRAE CYLINDRICAL 'KILN Original Filed April 27. 1920 @W m l Patented Nov. 15,1927.

' UNITED STATES PATENT foFFicn. enonea manna, or ammonia, o'manro, omens; nssmnon, a! new ASSIGN- mm'rs, ro roam LEHIGE courm, a coarona'rxon or nnnawnn.

' mmnaren- 'nmt.

' Application mm a n 21,1920, Serial no. $2 1,015. seemin; serial Ho. than.

This invention relates tocylindrical kilns, this "purpose. particularly in. 4 i

usually rotary,,1n.which solid materials are Figs. .2, 3 and 4 time drawings, the

subjected to the action of heat. Ordinarily instead of being made of -lap andriveted the shells of such kilns are formed of lapped I lates, isformed of}. pin ity of longitw 6 and riveted .pl ates,and m ob ect is to devise inal sections 3, each section being rovided a construction of shell w 1ch will bestifler along each of its straight edges wlth a ra- 45 stronger andlli hter than the older form 0 dial'flan'ge 4, these flanges extending outshell, and whic willpossess a flush. inside wardly a suflicient distance to provide suitsurface. able space for the bolts or rivets by which 10 Iattain m object by forming the shell of the; are secured togetherJ- a plurality o longitudinal sections, each seco tion having an outwardly extending radial lining 5 will be secured in any ordinary manflange formed along each straight edge abutner. ting a similar flange on the ad acent sect on, From the abo e deseriptlon it will be seen the adjacent flanges being secured together that the inside of the shellof thekiln is preferably by rivets or bo ts. flush, being without projections of any kmd. 55 I attain my object by means of the con- It will also be seen that the longitudinalribs struction hereinafter described and illus formed b the flanges 4 provide lon itudinal trated in the accompanying drawings in stiffness or the shell, so that the s ell as a hi h a v whole may be made of lighter material with- K Fig. lis a side elevation, partly-broken out m an way sacrificing strength, 6o awa of a cylindrical kiln; I What claim as my invention is Fig. 2 a cross section on an enlargedscale A cylmdr1cal kilncomprising a self-supthrough part of the kiln; porting metal shell having a smooth inner Fig. 3 a side elevation, partly in section, surface, this shell consisting of a plurality the interior of the 'shell the refractory sol of part of the kiln on the same scale as Fig. of similar channel sections each of which has 2; d I e an arcuate web with longitudinally extendig. 4 a perspective detail of part of one .ing flangesservmg to stifienthe web, these of the sections of the kiln. sections being assembled ed e-to-edge with v30 In the drawings like numerals of reference their flanges in contact and olted together,

indicate corresponding parts in'the difierent the sections being laid end-to-end throughfigures. v x out the length of the kiln in longitudinal The kiln, as will be seen from Fig. 1 of the. alignment with their ends contacting but. drawings, is in general of ordinary type, otherwise independent of each other,'and'a Y35 and is shown asadapted for rotation, 1 berefractory hmng inslde the. kiln covering ing the circular tracks commonlylem'ployed the inner faces ofthe sections. v

. and the sheaves or pulleys whereb power Signed at Brantford, Ontario, Canada,

maybe applied to rotate the kiln. 10 course, -th1s9th day of Apr l 1920. v nonen moms.

any ordinary gearing may be employedf for 

